Vacuum device



April 2-9, 1930. .1. BELHUMEUR I ,5

VACUUM DEVICE Filed March a, 1929 2 Sheets-Sheet 1 April 29, 9 J. A. BELHUMEUR 1,756,507

VACUUM DEVICE Patented Apr. 29, 1930 grease? 1 PATENT .oFFIcE 3 JOHN A. .BELHUMEUE, OF ESMOND, RHODE ISLAND VACUUM DEVICE Application filed March a,

' This invention relates to certain new and useful improvements in vacuum devices and pertains more particularly to a device of this type used for creating a vacuum in vapor '5 heating systems.

In systems of this type, a very low boiler pressure is utilized, so that a vapor, as distinguished from steam results from the heating of the hot water, the vapor being sucked up through the pipes of the heating system by means of a fan or the like, and being then forced downwardly to enter the bottom of the boiler.

The primary object of the present inven- 1 tion is to provide a vacuum creating device in which the vapor is boosted so as to accelerate circulation thereof.

The invention further aims to provide a device of this type which has improved means for producing a vacuum and to further provide a device of this type which is of simple construction and of high efiiciency in use.

In the drawings Figure 1 is a longitudinal sectional view of the invention;

Figure 2 is an end elevation;

Figure 3 is a section on a line 33 of Figure 1, and

Figure 4 is a detail perspective view of a fragment of the rotor.

In proceeding in accordance with the present invention a base 1 is employed upon which is mounted a cylinder 2, which is closed by end walls 3. The base of the cylinder is formed with an inlet 4 and an oppositely disposed outlet 5, theinlet being located above the outlet. The rotor has a hub 6 mounted on a shaft 7 the shaft being journaled in standards 8 and may be driven by any suitable means, such as for example, pulley 9. The rotor is provided with straight arms 10 which latter extend diametrically of the rotor and have a substantially right angular relation, or otherwise stated are of cruci-form. Curved vanes 11 extend outwardly from each of the arms 10 at points intermediate the ends or substantially at the center of the arms, and to the inner circumference of the cylinder, thus providing the rotor with large chambers 12 1929. Serial 05345 76.

and with small chambers 13, which chambers it will be noted alternate. The concave sides of the curved arms confront the inlet as the arms approach the inlet so as to obtain a quick pick-up. For the purpose of support-' ing and strengthening the straight and "the curved arms, bars 1% are employed which are connected theretoiand which are of small crosssection so as to lessen the capacity of the chambers as little as possible, and still obtain a strong and rigid structure. As shown in Figure 3 the side faces of the straight and curved arms 10 and 11 engage the end walls 3 of the rotor casing.

Referring to Figure l of the drawings, it will be seen that a relief port 15 is provided and which is located above the inlet 4. Preferably, a pressure indicator or gage '16 is employed and is connected to the inlet this occurs the valve 17 is opened permitting air to flow in and slightly cool the parts, or water may be. used vfor this purpose and be admitted through the valve 17 if desired. The object, of course, is to create a vacuumat the topof thesystem so as to cause lifting of the hot vapor through the system and then to discharge it by the rotor into thedown flow riser to supply the boiler with the condensed water and cause reheating of the same and thereby the formation of heating vapor.

Bythe use of large and small chambers 12 and 13 the invention not only obtains a de-' cided lift, producing a vacuum in the inlet port, but in addition obtains a quick pickup by the curved arms of the small chambers thus boosting the action of the vapor that has been delivered from the large chambers to the outlet chambers, and thereby accelerating circulation of vapor.

Having thus described my invention What I claim as new and desire to secure by Letcters Patent is 1. A vacuum device of the character described comprismg a cylinder having an 1nlet, an-outlet opposlte to and disposed on a plane lower than said inlet, an air zrel'ie'f chamber formed in said cylinder above said inlet having a valve controlled relief port, a rotor in the cylinder having a hub-,a plurality of radially extending arms carried by said hub and disposed at right anglestoeach other, and an arm carried by each of said radially extending arms intermediate the ends of the latter and having its free end curved outwardlywhere-by to provide alternate large and small chambers havlng their inner} ends closed. 7

2. A rotor for vacurnn'systems including a cylinder, a shaft in said-cylinder, a rotor one said shaft having a hub, a plurality of radially extending spaced arms carried by said huh and disposed at right angles to each other, a curved a rm carried by each of the first namedarmsv intermediate the ends of the latter and having its free end curved outwardlyand terminating at a point :at one sideof a radial line drawn centrally through the space between each pair of radially extending arms, whereby the curved arms form small chambers in conjunction with the .ra-V

dial arms to which the curved arms arecon- 'nected and large chambers 1H con unct1on with the succeeding radial arm.

3 A rotor for vacnmnsystemsincluding a cylinder, a shaft in said cylinder, a rotor on said shaft having a hub, a, plurality oi radially extending spaced .armscarried by said hub and disposedat right angles to each other, a curved .arm carried by each of the first named arms intermediate the ends of the vlatter and having, its free end curved outwardly and terminating ata pointyat one 7 side of a radial-line drawn centrally through thespac'e between each pair of radi'ally extending arms, whereby the CUIVQClEllIlflS form small chambers in conjunction with the radial arms to: which the curved arms are connected and large chambers' in conjunction with the succeec'lingradial arm, and a "braci-ngibar' connected tovea'ch ofthe radially extending arms. intermediate the ends of the latter and to the free end of the adjacent curved arms. y r i y In testimony whereof I have signed my vname to this specification.

JOHN A; 'BELHUMEUR 

